The TBM 900 airframe design employs several fail-safe structural design techniques, including the use of multiple load paths and a crack-stopper band to maximize subsystem reliability/durability and structural life.

The TBM 900 aircraft is essentially identical to that of the TBM 850 and 700 models. Airframe designers carefully chose a variety of aluminum alloys, highstrength steel (including titanium). However TBM 900 uses more advanced composite materials such as carbon fiber for its new items (winglets, new cowlings, etc.) to maximize structural strength and durability while minimizing aircraft weight and both acquisition and life-cycle support costs.